BMW 7 Series: System Overview

The Telematics Control Unit (TCU) and the interface box 'High' (ULF-SBX-H) control units are connected to the MOST bus. TCU and interface box 'High' may both be fitted in the vehicle for certain equipment options. In this case, the telephone function is always implemented in the TCU.

The head unit transmits the audio signal in analog form to the HiFi amplifier and the amplifier distributes the audio output to the loudspeakers in the car.

The HiFi system is fitted as standard in the F01/F02.

If the "Top HiFi system" is installed in the car, the audio signal is transmitted digitally on the MOST bus to the HiFi amplifier and the amplifier distributes this signal to all the loudspeakers.

Audio playback of the call recipient is via the front right, front left and center loudspeakers.

For the sake of clarity the various individual loudspeakers are not shown in the schematic circuit diagrams.

The Telematics Control Unit (TCU) used in the F01/F02 is similar to one used in the E70.

The pairing wizard is again integrated in the F01/F02 to assist the customer in pairing the mobile phone.

Fig. 16: Identifying Vehicle Bluetooth Menu With Bluetooth Enabled Mobile Phones

NOTE: The specified range of functions will only be achieved with Bluetooth-enabled mobile phones recommended by BMW. See a list of compatible phones at www.wireless4bmw.com.

Inputs/outputs, ULF- SBX High Interface Box

Fig. 17: ULF-SBX High Interface Box Input/Output Diagram

INDEX REFERENCE CHART

1. Instrument cluster
2. Central Information Display (CID)
3. Speaker
4. Microphone (passenger's side)
5. Wheel speed sensor
6. Bluetooth antenna (Connectors to TCU in US cars)
7. USB audio interface; if no USB hub is installed the connection is to the ULF-SBX-H
8. Roof antenna (for snap-in adapters mobile phone
9. Snap-in adapter with mobile phone or Smartphone Integration
10. USB hub
11. Microphone (driver's side)
12. Interface box 'High' (ULF-SBX-H)
13. Car Information Computer (CIC)
14. Central gateway module (ZGM)
15. Controller (CON)
16. Multifunction steering wheel (MFL)

Optional extras "USB/Audio interface" and "Smartphone Integration" require the installation of the ULF-SBXHigh Interface box.

The USB hub is installed only if the car is ordered with the "Smartphone Integration" optional extra.

The mobile phone and the interface communicate via the Bluetooth antenna.

Voice output by the telephone system is via the vehicle's front right, front left and center loudspeakers. Volume can be adjusted by means of the multifunction steering wheel and the CIC. Speed-related volume control is also active.

Although both the ULF-SBX-H and the TCU may be fitted in a vehicle at the same time, the TCU always provides the telephone functions. In this case the telephone functions are not available in the ULF-SBX High and the module is only installed to provide the "USB audio interface" option.

ULF- SBX High Interface Box Circuit Diagram

Fig. 18: ULF-SBX High Interface Box Circuit Diagram

INDEX REFERENCE CHART

1. Central gateway module (ZGM)
2. Instrument cluster
3. Central Information Display (CID)
4. Car Information Computer (CIC)
5. Fuse in the junction box
6. Microphone (passenger's side)
7. Power distributor, rear
8. Interface box 'High' (ULF-SBX-H)
9. Not for US
10. Not for US
11. Roof antenna
12. Base plate with snap-in adapter
13. Bluetooth antenna
14. Controller (CON)
15. Microphone (driver's side)
16. Steering column switch cluster (SZL)

Smartphone Integration Option Circuit Diagram

Fig. 19: Smartphone Integration Option Circuit Diagram

INDEX REFERENCE CHART

1. Central gateway module (ZGM)
2. Steering column switch cluster (SZL)
3. Central Information Display (CID)
4. Car Information Computer (CIC)
5. Controller (CON)
6. USB audio interface (AUX)
7. Base plate with snap-in adapter
8. Fuse in fuse carrier at rear right
9. Interface box (ULF-SBX-H)
10. USB hub

MOST signals to the ULF-SBX/ULF-SBX-H control units

MOST SIGNAL DESCRIPTION CHART

NOTE: For detailed information on the Smartphone Integration optional extra (option 6NF), refer to the F01/F02 AUDIO SYSTEMS training material.

Input/outputs, Telematics Control Unit

Fig. 20: Telematics Control Unit Input/Outputs Diagram

1. Instrument cluster
2. Central Information Display (CID)
3. Speaker
4. Roof function module (FZD)
5. Microphone (passenger's side)
6. Wheel speed sensor
7. Bluetooth antenna
8. Crash safety module (ACSM)
9. GPS antenna
10. Emergency-call GSM antenna (back-up)
11. Car Access System (CAS)
12. Roof antennal for TCU and snap-in cradle adapter and internal telephone module of the TCU
13. Snap-in adapter cradle with mobile phone
14. Footwell module (FRM) for remote door unlocking and remote door locking
15. Microphone (driver's side)
16. Telematics Control Unit (TCU)
17. Car Information Computer (CIC)
18. Central gateway module (ZGM)
19. Controller (CON)
20. Multifunction steering wheel (MFL)

Voice output by the telephone system is via the vehicle's front right, front left and center speakers.

Volume can be adjusted by means of the multifunction steering wheel and the IHKA/audio control unit.

Telematics Control Unit (TCU) Circuit Diagram

Fig. 21: Telematics Control Unit (TCU) Circuit Diagram

INDEX REFERENCE CHART

1. Dynamic Stability Control (DSC)
2. Central Information Display (CID)
3. Head unit (CIC)
4. Integrated automatic heater and A/C control (IHKA)
5. Controller (CON)
6. Fuse in the junction box
7. Microphone (passenger's side)
8. Roof function module (FZD)
9. Base plate phone snap-in adapter
10. Roof antenna
11. Emergency-call GSM antennal (back-up)
12. Telematics Control Unit (TCU)
13. Bluetooth antenna
14. Microphone (driver's side)
15. Steering column switch cluster (SZL)
16. Instrument cluster
17. SOS speaker
18. Crash safety module (ACSM)
19. Car Access System (CAS)
20. Footwell module (FRM)
21. Central gateway module (ZGM)

MOST signals on the control unit TCU

MOST SIGNAL FUNCTIONAL CHART

The TCU receives its power supply via terminal 30F. The power supply via terminal 30F is necessary for the provision of the BMW ASSIST services, including for example:

• Remote Door Unlock
• Vehicle Finder/Stolen Vehicle Recovery
• Remote Climate Control.

These services are implemented via the MOST bus. The TCU reacts to a call from the provider, placed at the customer's request. The TCU sends a signal via the MOST bus to the Car Access System (CAS). The CAS then wakes up the vehicle.

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